How much does a 5.00ct+ F SI1 lab grown marquise diamond cost?

As of November 2026, 5.00ct+ F SI1 lab grown marquise diamonds typically cost $1,620 NZD to $7,768 NZD, with a median price of $3,273 NZD. There are currently 23 diamonds matching this specification available across retailers.

Where can I find the best price on a F SI1 marquise diamond?

About 40% of these diamonds are available at multiple retailers, with an average price spread of 111%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ F SI1 Lab Grown Marquise

Quick answer

As of November 2026, there are 23 lab grown marquise diamonds with F colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $1,620 NZD to $7,768 NZD, with a median of $3,273 NZD. At least 32 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 111%. Half of all listings fall between $375 NZD and $988 NZD per carat. The same specification in natural form lists at a median of about $35,394 NZD per carat. Over the last 30 days the median price moved -17.7% and the number of listings moved +36.5%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Marquise lab grown stones in the index: 485 USD per carat, -3.2% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: November 2026

Available

Lowest Price

$1,175 NZD

Highest Price

$17,388 NZD

Average Price

$4,269 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

40.3%

Price Spread

111.2%

30-Day Price Trend

-17.7%

30-Day Supply Change

+36.5%

Volatility (30d)

0.05

Price Range

Price per carat distribution across retailers

$310/ct

10th Percentile

$152

Median

$310

90th Percentile

$738

Score Distribution

39 diamonds scored across 4 quality tiers

Excellent

13 (33.3%)

Very Good

5 (12.8%)

Good

12 (30.8%)

Average

9 (23.1%)

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Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1